Annual Report to Shareholders
Puerto Rico Industrial Development
| Columbia | 1947-1948, 1950, 1956-1962 |
| Harvard | 1961-63, 65-81, 83, 1981. |
| MIT | 1947, 1948, 1949, 1950, 1951, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1973, |
